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Hailey showed off her stunning figure in a blue and silver crop top over matching skirt along with lock black socks.

She added a blue fleece coat and heeled ankle boots and wore her long hair in a double bun.

Costume: Hailey and Shawn weren't snapped together although there were plenty of photos of the blonde model arriving for the star-studded party dressed up as Powerpuff Girl Bubbles

It's not the first time that Hailey and Shawn have sparked dating rumors.

Last month, they were spotted together at Universal Studios’ Halloween Horror Nights.

A few days later they were seen having dinner together.

New romance? Canadian singer Shawn, pictured in August, 'had his arm around Hailey and stayed by her side all night,' a source told People

Shawn, from Toronto, Canada, burst onto the music scene in 2014 after getting a record deal due to his huge fan following on social media.

His first album Handwritten debuted at number one on the Billboard 200 chart in April 2015 and went platinum. His follow-up album Illuminate also topped the charts in June 2016.

He's also won several awards including two MTV Europe Music Awards, four iHeartRadio Much Music Video Awards and a People's Choice Award for Favorite Breakout Artist.

Hitmaker: Shawn, from Toronto, burst onto the music scene in 2014 after getting a record deal due to his huge fan following on social media. He's pictured performing at Rock In Rio 2017

Hailey, meanwhile, has become an in demand model since landing her first commercial campaign for French Connection in 2014 as well as her first catwalk bookings.

She's gone to be photographed for Vogue, Teen Vogue, Marie Claire and Harper's Bazaar and has walked for top designers including Ralph Lauren, Moschino and Dolce & Gabbana. In May this year, she topped the Maxim magazine list of the most beautiful women in the world.

Her father is the actor Stephen Baldwin and her uncle is 30 Rock and SNL star Alec Baldwin.

Fashion muse: Hailey, daughter of actor Stephen Baldwin, has become an in demand model after getting her first commercial and catwalk gigs in 2014